pH-Sensitive Siloxene-based Composite Materials Endow the Epoxy Coating with Efficient Self-Healing Function and...

Area of Science:

• Materials Science and Engineering
• Corrosion Science
• Nanotechnology

Background:

• Long-term corrosion resistance of metal coatings is a significant challenge.
• Limitations of single nanofillers in providing comprehensive corrosion protection.
• Need for advanced composite materials with multifunctional properties.

Purpose of the Study:

• To develop a novel composite coating for enhanced metal protection.
• To integrate siloxene, polyaniline (PANI), and Ce-MOF for synergistic effects.
• To improve corrosion resistance, self-healing, and mechanical properties of coatings.

Main Methods:

• Fabrication of a composite structure using siloxene as a substrate, incorporating polyaniline (PANI) and Ce-MOF.
• Characterization of corrosion resistance using electrochemical impedance spectroscopy (EIS).
• Evaluation of mechanical properties including adhesion, tensile strength, and wear resistance.

Main Results:

• The composite coating exhibited a significant increase in impedance (|Z|0.01 Hz) by 1.5 orders of magnitude.
• Corrosion current decreased by over 80% after 20 days of immersion.
• Wear rate reduced by more than 80%, with substantial improvements in adhesion, tensile strength, and modulus.

Conclusions:

• The siloxene/PANI/Ce-MOF composite coating provides superior long-term corrosion resistance and self-healing capabilities.
• Enhanced mechanical properties, including adhesion, tensile performance, and wear resistance, were achieved.
• This study presents a promising strategy for developing versatile nanofillers and siloxene-based materials for epoxy coatings.